Brother S-7250A Instruction Manual

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INSTRUCTION MANUAL

S-7250A

Please read this manual before using the machine. Please keep this manual within easy reach for quick reference.

SINGLE NEEDLE DIRECT DRIVE LOCK STITCHER WITH ELECTRONIC FEEDING SYSTEM AND THREAD TRIMMER

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Thank you very much for buying a BROTHER sewing machine. Before using your new machine, please read the safety instructions and the explanations given in the instruction manual.

With industrial sewing machines, it is normal to carry out work while positioned directly in front of moving parts such as the needle and thread take-up, and consequently there is always a danger of injury that can be caused by these parts. Follow the instructions from training personnel and instructors regarding safe and correct operation before operating the machine so that you will know how to use it correctly.

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SAFETY INSTRUCTIONS

[1] Safety indications and their meanings

This instruction manual and the indications and symbols that are used on the machine itself are provided in order to ensure safe operation of this machine and to prevent accidents and injury to yourself or other people. The meanings of these indications and symbols are given below.

Indications

DANGER

CAUTION

Symbols

WARNING

· · · · ·

This symbol ( ) indicates something that you should be careful of. The picture inside the triangle indicates the nature of the caution that must be taken. (For example, the symbol at left means “beware of injury”.)

This symbol ( ) indicates something that you must not do.

This symbol ( ) indicates something that you must do. The picture inside the circle indicates the

nature of the thing that must be done. (For example, the symbol at left means “you must make the ground connection”.)

The instructions which follow this term indicate situations where failure to follow the instructions will result in death or serious injury.

The instructions which follow this term indicate situations where failure to follow the instructions could result in death or serious injury.

The instructions which follow this term indicate situations where failure to follow the instructions may result in minor or moderate injury.

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[2] Notes on safety

Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet before opening the cover of the control box. Touching areas where high voltages are present can result in severe injury.

Do not allow any liquids to get onto this sewing machine, otherwise fire, electric shocks or operating problems may occur.

If any liquid gets inside the sewing machine (machine head or control box), immediately turn off the power and disconnect the power plug from the electrical outlet, and then contact the place of purchase or a qualified technician.

DANGER

WARNING

CAUTION

Environmental requirements

Use the sewing machine in an area which is free from sources of strong electrical noise such as electrical line noise or static electric noise. Sources of strong electrical noise may cause problems with correct operation.

Any fluctuations in the power supply voltage should be within 10% of the rated voltage for the machine. Voltage fluctuations which are greater than this may cause problems with correct operation.

The power supply capacity should be greater than the requirements for the sewing machine's power consumption. Insufficient power supply capacity may cause problems with correct operation.

Machine installation should only be carried out by a qualified technician.

Contact your Brother dealer or a qualified electrician for any electrical work that may need to be done.

The sewing machine weighs approximately 35 kg (77lb). The installation should be carried out by two or more people.

Do not connect the power cord until installation is complete. The machine may operate if the treadle is depressed by mistake, which could result in injury.

Turn off the power switch before inserting or removing the plug, otherwise damage to the control box could result.

Be sure to connect the ground. If the ground connection is not secure, you run a high risk of receiving a serious electric shock, and problems with correct operation may also occur.

When securing the cords, do not bend the cords excessively or fasten them too hard with staples, otherwise there is the danger that fire or electric shocks could occur.

Installation

The ambient temperature should be within the range of 5C to 35C during use. Temperatures which are lower or higher than this may cause problems with correct operation.

The relative humidity should be within the range of 45% to 85% during use, and no dew formation should occur in any devices. Excessively dry or humid environments and dew formation may cause problems with correct operation.

In the event of an electrical storm, turn off the power and disconnect the power cord from the wall outlet. Lightning may cause problems with correct operation.

Do not connect anything to the USB port other than the USB memory. If this is not observed, problems with operation may result.

If using a work table which has casters, the casters should be secured in such a way so that they cannot move.

Secure the table so that it will not move when tilting back the machine head. If the table moves, it may crush your feet or cause other injuries.

Use both hands to hold the machine head when tilting it back or returning it to its original position. If only one hand is used, the weight of the machine head may cause your hand to slip, and your hand may get caught.

Be sure to wear protective goggles and gloves when handling the lubricating oil and grease, so that they do not get into your eyes or onto your skin, otherwise inflammation can result. Furthermore, do not drink the oil or eat the grease under any circumstances, as they can cause vomiting and diarrhea. Keep the oil out of the reach of children.

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This sewing machine should only be used by operators who have received the necessary training in safe use beforehand.

The sewing machine should not be used for any applications other than sewing.

Be sure to wear protective goggles when using the machine. If goggles are not worn, there is the danger that if a needle breaks, parts of the broken needle may enter your eyes and injury may result.

Turn off the power switch at the following times. The machine may operate if the treadle is depressed by mistake, which could result in injury.

 When threading the needle  When replacing the bobbin and needle  When not using the machine and when leaving

the machine unattended

If using a work table which has casters, the casters should be secured in such a way so that they cannot move.

CAUTION

Sewing

Attach all safety devices before using the sewing machine. If the machine is used without these devices attached, injury may result.

Do not touch any of the moving parts or press any objects against the machine while sewing, as this may result in personal injury or damage to the machine.

Secure the table so that it will not move when tilting back the machine head. If the table moves, it may crush your feet or cause other injuries.

If an error occurs in machine operation, or if abnormal noises or smells are noticed, immediately turn off the power switch. Then contact your nearest Brother dealer or a qualified technician.

If the machine develops a problem, contact your nearest Brother dealer or a qualified technician.

Cleaning

Turn off the power switch before carrying out cleaning. The machine may operate if the treadle is depressed by mistake, which could result in injury.

Secure the table so that it will not move when tilting back the machine head. If the table moves, it may crush your feet or cause other injuries.

Maintenance and inspection

Maintenance and inspection of the sewing machine should only be carried out by a qualified technician.

Ask your Brother dealer or a qualified electrician to carry out any maintenance and inspection of the electrical system.

Turn off the power switch and disconnect the power cord from the wall outlet at the following times, otherwise the machine may operate if the treadle is depressed by mistake, which could result in injury.

 When carrying out inspection, adjustment and

maintenance

 When replacing consumable parts such as the

rotary hook and knife

Always be sure to turn off the power switch and then wait one minute before opening the pulley cover. If you touch the surface of the motor, it may cause burns.

If the power switch needs to be left on when carrying out some adjustment, make sure that you switch the sewing machine to maintenance mode. Pay careful attention to safety.

Secure the table so that it will not move when tilting back the machine head. If the table moves, it may crush your feet or cause other injuries.

When replacing parts and installing optional accessories, be sure to use only genuine Brother parts. Brother will not be held responsible for any accidents or problems resulting from the use of non-genuine parts.

If any safety devices have been removed, be absolutely sure to re-install them to their original positions and check that they operate correctly before using the machine.

To prevent accidents and problems, do not modify the machine yourself. Brother will not be held responsible for any accidents or problems resulting from modifications made to the machine.

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[3] Warning labels

The following warning labels appear on the sewing machine.

Please follow the instructions on the labels at all times when using the machine. If the labels have been removed or are difficult to read, please contact your nearest Brother dealer.

* Safety devices: (A) Finger guard

Touching areas where high voltages are present can result in severe injury. Turn off the power before opening the cover.

(B) Thread take-up cover (C) Motor cover (D) Pulse motor cover

Be careful not to get your hands caught when returning the machine head to its original position after it has been tilted.

Be careful to avoid injury from the moving thread take-up.

High temperature warning display

Be sure to connect the ground. If the ground connection is not secure, you run a high risk of receiving a serious electric shock, and problems with correct operation may also occur.

Direction of operation

Do not hold. Problems with operation or injury may occur.

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Do not place your hands inside the bottom cover. Problems with operation or injury may occur.

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Transformer box (100V/110V/380V/400V)

Oil tank

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1460D

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1. MACHINE SPECIFICATIONS ............... 1

2. INSTALLATION ..................................... 2

2-1. Table processing diagram ................................ 3

2-2. Installation ........................................................ 3

2-3. Lubrication ........................................................ 6

2-4. Connecting the cords ........................................ 7

2-4-1. Connecting the cords ............................. 7

2-4-2. Other cords ............................................ 9

3. USING THE OPERATION PANEL

(BASIC OPERATIONS) ........................ 13

3-1. Names and functions ...................................... 13

3-2. Sewing start and end backtack stitches ......... 15

3-3. Sewing continuous backtack stitches ............. 16

4. USING THE OPERATION PANEL

(ADVANCED OPERATIONS) .............. 17

4-1. Sewing pitch setting method .......................... 17

4-2. Switching the 4-digit display ........................... 18

4-3. Setting the sewing speed ............................... 18

4-3-1. Setting the maximum sewing speed .... 18

4-3-2. Backtack sewing speed setting

method ................................................. 19

4-4. Setting the counters ........................................ 20

4-4-1. Lower thread counter ........................... 20

4-4-2. Production counter ............................... 21

4-4-3. Needle replacement counter ................ 22

4-5. Sewing locus setting meth .............................. 23

4-6. Setting basic functions .................................... 24

4-6-1. Changing the needle stop position ...... 25

4-6-2. Thread trimming disable ...................... 26

4-6-3. Thread wiping ...................................... 27

4-6-4. Correction sewing ................................ 28

4-6-5. Slow start ............................................. 29

4-6-6. Setting the illumination LED light ......... 30

4-6-7.

Setting lower thread counter operation

4-6-8. Prev. thread away ................................ 32

4-6-9. Short trailing thread .............................. 33

4-6-10. Correction sewing function (1) ........... 34

4-6-11. Correction sewing function (2) ........... 35

4-7. Memory switch setting method ....................... 36

4-8. List of memory switch settings ....................... 37

4-9. Reading and writing data using USB media ... 41

4-10. Resetting all settings to their defaults ........... 42

4-11. Hand switch .................................................. 43

4-11-1. Hand switch function setting .............. 45

4-11-2. 2nd correction pitch setting ................ 46

4-11-3. 2nd pitch setting ................................. 46

. 31

4-11-4. Menu numbers for setting functions for

the hand switch .................................. 46

5. CLEANING ........................................... 47

6. STANDARD ADJUSTMENTS .............. 48

6-1. Arm thread guide R ......................................... 48

6-2. Presser foot height .......................................... 49

6-3. Adjusting the feed dog height ......................... 50

6-4. Adjusting the feed dog angle .......................... 51

6-5. Adjusting the needle bar height ...................... 51

6-6. Adjusting the needle and feed mechanism

timing ............................................................... 52

6-7. Needle and rotary hook timing ........................ 53

6-8. ADJUSTING THE ROTARY HOOK

LUBRICATION AMOUNT ............................... 54

6-9. Thread trimming (Other than short trailing thread

specifications) ................................................. 55

6-10. Thread trimming (Short trailing thread

specifications) ............................................... 58

7. TROUBLESHOOTING .......................... 61

7-1. Sewing ............................................................ 61

7-2. Error code displays ......................................... 68

8. 7-SEGMENT DISPLAY ......................... 72

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1. MACHINE SPECIFICATIONS

Thread wiper

1424D

Specifications Short trailing thread specifications

Use For medium-weight materials For heavy-weight materials Max. sewing speed * Standard feed locus Sewing speed at the time of shipment 4,000 sti/min Backtack sewing speed * Standard feed locus

Max. stitch length 5 mm 5 mm (can be set to 7 mm) Presser foot height Feed dog height 0.8 mm 1.2 mm Needle (DB×1, DP×5) #11 - #18 #19 - #22 Motor AC servo motor Control circuit Microprocessor

Lifting lever 6 mm Knee lifter 13 mm

Stitch length 2.0 mm or less/

Automatic 150 (*1) - 3000 sti/min, Manual 150 (*1) - 4000 sti/min*

3 5

5,000 sti/min

(*1) Inching setting speed

3 4

4,000 sti/min

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2. INSTALLATION

CAUTION

Machine installation should only be carried out by a qualified technician.

Contact your Brother dealer or a qualified electrician for any electrical work that may need to be done.

The sewing machine weighs approximately 35 kg (77lb). The installation should be carried out by two or more people.

Do not connect the power cord until installation is complete. The machine may operate if the treadle is depressed by mistake, which could result in injury.

About the machine set-up location

・ Do not set up this sewing machine near other equipment such as

televisions, radios or cordless telephones, otherwise such equipment may be affected by electronic interference from the sewing machine.

・ The sewing machine should be plugged directly into an AC wall

outlet. Operation problems may result if extension cords are used.

2. INSTALLATION

Secure the table so that it will not move when tilting back the machine head. If the table moves, it may crush your feet or cause other injuries.

0475D

Carrying the machine

・ The sewing machine should be carried by the arm and the motor

cover by two people as shown in the illustration.

* Do not hold by any part other than the motor cover. If this is not

observed, it may result in damage to the sewing machine.

Tilting back the machine head

・ Hold section (A) with your foot so that the table does not move,

and then push the arm with both hands to tilt back the machine head.

Returning the machine head to the upright position

1. Clear away any tools, etc. which may be near the table holes.

2. While holding the face plate with your left hand, gently return the machine head to the upright position with your right hand.

1341D

1342D

1343D

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2. INSTALLATION

2-1. Table processing diagram

・ The top of the table should be 40 mm in thickness and should be strong enough to hold the weight and withstand the

vibration of the sewing machine.

・ Drill holes as indicated in the illustration below.

Head rest hole

Cotton stand hole

Cord hole

Control box mounting hole

1412D

2-2. Installation

1. Control box + Oil pan

(1) Control box (2) Bolts [4 pcs] (3) Nuts [4 pcs] (4) Spring washers [4 pcs] (5) Washers [4 pcs]

2. Connecting rod

(6) Connecting rod (7) Nut

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2. INSTALLATION

3. Rubber cushions

(1) Rubber cushions [2 pcs]

1414D

4. Machine head

(1) Hinges [2 pcs] (2) Machine head (3) Head rest

NOTE:

・ Bind the cords together and pass

them through the cord hole.

・ Tap the head rest (3) securely into

the table hole.

・ If the head rest (3) is not pushed in

as far as it will go, the machine head will not be sufficiently stable when it is tilted back.

1415D

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2. INSTALLATION

10mm

1416D

Within 13 mm

1417D

5. Knee lifter plate

1. Turn the machine pulley so that the feed dog is below the top of the needle plate.

2. Lower the presser foot (1) by using the lifting lever (2).

3. Loosen the nut (3).

4. Turn the screw (5) to adjust so that the amount of play in the knee lifter plate (4) is approximately 10 mm.

5. After adjustment is completed, securely tighten the nut (3).

6. Loosen the nut (6).

7. Turn the adjusting screw (8) to adjust so that the presser foot (7) is at the desired position within a distance of 13 mm from the needle plate when the knee lifter plate is fully pressed.

8. After adjustment is completed, securely tighten the nut (6).

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2-3. Lubrication

Do not connect the power cord until lubrication has been completed, otherwise the machine may operate if the treadle is depressed by mistake, which could result in injury.

Be sure to wear protective goggles and gloves when handling the lubricating oil, so that it does not get into your eyes or onto your skin. If care is not taken, inflammation can result. Furthermore, do not drink the lubricating oil. Diarrhea or vomiting may result. Keep the oil out of the reach of children.

When cutting the nozzle of the oil tank, hold the base of the nozzle securely.

If you hold the end of the nozzle, injury from the scissors may result.

2. INSTALLATION

CAUTION

The sewing machine should always be lubricated and the oil supply replenished before it is used for the first time, and also after long periods of non-use.

1. Hold the base of the nozzle of the accessory oil tank (1), and use scissors to cut about half-way along the straight section (A) of the nozzle.

2. Loosen and remove the nozzle, and then remove the seal (2).

3. Tighten the nozzle.

4. Tilt back the machine head.

5. Remove the rubber cap (3), and pour lubricating oil into the oil cover (4) until it reaches the upper reference line (5).

6. Replace the rubber cap (3).

7. Return the machine head to its original position.

NOTE:

When the machine head is tilted back at times such as the following, lubricating oil may leak out from the oil cover (4).

1) If lubricating oil is added until the oil level goes above the upper reference line (5) on the oil cover (4).

If the oil level drops below the lower reference line (6) on the oil cover (4), be sure to replenish the oil.

Upper

reference line

Lower

reference line

1418D

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2. INSTALLATION

2-4. Connecting the cords

Contact your Brother dealer or a qualified electrician for any electrical work that may need to be done.

Do not connect the power cord until all cords have been connected. The machine may operate if the treadle is depressed by mistake, which could result in injury.

When securing the cords, do not bend the cords excessively or fasten them too hard with staples, otherwise there is the danger that fire or electric shocks could occur.

Be sure to connect the ground. If the ground connection is not secure, you run a high risk of receiving a serious electric shock, and problems with correct operation may also occur.

2-4-1. Connecting the cords

Align the flat edges

CAUTION

Ground symbol

1419D

1. Cor ds ( 1)

(1) Solenoid connector 14-pin (2) Sewing machine motor encoder

connector 10-pin

(3) Feed motor encoder connector

6-pin (4) Operation panel connector 5-pin (5) Power connector 3-pin

1. Secure the cords to the control box

with the black band (6).

NOTE:

For Europe specifications, Americas 220 V specifications and 100 V/400 V system specifications, refer to “2-4-2. Other cords”.

2. Ground wire

(1) Ground wire (2)

Screw

(3) Power cord

1. Attach an appropriate plug to the

power cord (3). (The green and yellow wire is the ground wire.)

2. Insert the power plug into a

properly-grounded electrical outlet.

Green and yellow wire (ground wire)

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1420D

NOTE:

・ Make sure that the ground

connections are secure in order to ensure safety.

・ For Europe specifications, Americas

220 V specifications and 100 V/400 V system specifications, refer to “2-4-2. Other cords”.

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2. INSTALLATION

3. Cords (2)

(1) Machine motor connector 4-pin (2) Feed motor connector 6-pin

Lower the tab (3).

Push in securely until the tabs (3) engage.

1421D

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2. INSTALLATION

2-4-2. Other cords

DANGER

For Europe specifications, Americas 220 V specifications and 100 V/400 V system specifications, connect the cords according to the respective specifications.

<Europe specifications> (1) Filter box (2) Screws [4 pcs] (3) Connector (4) CE bush plate (5) Screws [2 pcs] (6) CE D cord cover (7) Screws [2 pcs] (8) Staples [4 pcs] (9) Power cord

1. Attach an appropriate plug to the

power cord (9). (The green and yellow wire is the ground wire.)

2. Insert the power plug into a

properly-grounded electrical outlet.

NOTE:

・ Take care when tapping in the

staples (8) to make sure that they do not pierce the cords.

・ Do not use extension cords,

otherwise machine operation problems may result.

Leg

Control box

Green and yellow wire (ground wire)

1480D

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For Europe specifications, Americas 220 V specifications and 100 V/400 V system specifications, connect the cords according to the respective specifications.

(1) Power switch (2) Screws [2 pcs]

2. INSTALLATION

Operator

4145M

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2. INSTALLATION

(3) Transformer box (4) Transformer box plates [2 pcs] (5) Screws [with washer] [4 pcs] (6) Power supply connector 3-pin (7) Staples [5 pcs] (8) Cord clamps [2 pcs] (9) Power cord

1. Attach an appropriate plug to the

power cord (10). (The green and yellow wire is the ground wire.)

2. Insert the power plug into a

properly-grounded electrical outlet.

NOTE:

・ Take care when tapping in the

staples (7) to make sure that they do not pierce the cords.

・ Do not use extension cords,

otherwise machine operation problems may result.

Green and yellow wire (ground wire)

1479D

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2. INSTALLATION

(1) Power switch (2) Screws [2 pcs]

Operator

4145M

(3) Power supply connector 3-pin (4) Power cord (5) Staples [5 pcs]

1. Attach an appropriate plug to the

power cord (4). (The green and yellow wire is the ground wire.)

2. Insert the power plug into a

properly-grounded electrical outlet.

Green and yellow wire (ground wire)

NOTE:

・ Take care when tapping in the

staples (5) to make sure that they do not pierce the cords.

・ Do not use extension cords,

otherwise machine operation problems may result.

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1423D

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3. USING THE OPERATION PANEL (BASIC OPERATIONS)

USING THE OPERATION PANEL (BASIC OPERATIONS)

3-1. Names and functions

・ The operation panel keys cannot be operated while sewing is in progress.

Select the keys and set the number of stitches before starting sewing.

・ In the case of keys with indicators, the indicator illuminates when that function is operating, and the indicator switches off

when the key is pressed once more.

Power indicator

Stitch No. indicator

Speed indicator

Counter indicator

Locus indicator

Program indicator

1425D

The power indicator illuminates when the power switch is turned on.

(1) 3-digit display

Displays the sewing pitch.

(2) Pitch setting keys

(3) 4-digit display

(4) SEL (Select) key

Use these keys to set the sewing pitch. ・When the - key is pressed, the setting decreases in steps of 0.05 within a range of 0.05 to

5.00.

When the + key is pressed, the setting increases in steps of 0.05 within a range of 0.05 to

・

5.00.

・ When start backtack stitches are being displayed, the indicator of the start backtack key

(6) will illuminate, and the number of A stitches will appear in the A column and the number of B stitches will appear in the B column.

・ When end backtack stitches are being displayed, the indicator of the end backtack key

(7) will illuminate, and the number of C stitches will appear in the C column and the number of D stitches will appear in the D column.

・ When continuous backtack stitches are displayed, the indicator of the continuous

backtack key (8) will illuminate, and the number of A, B, C and D stitches will appear in order starting from the left column of the display.

・ The five indicators on the right side of the window show which value is appearing in the

4-digit display. The 4-digit display shows the number of stitches, speed, counter, locus and program. When the number of stitches is being displayed, the ABCD indicator (Stitch No. indicator) will illuminate.

The value in the 4-digit display (3) can be changed each time this key is pressed.

(5) Setting keys

These keys are used to set the number of backtack stitches for A, B, C and D.

・ When the key is pressed, the setting increases from 0 up to 9. ・ If you press the key once more when “9” is displayed, the value will return to “0”. ・ If you hold down the key, the value will change continuously.

1426D

1427D

1428D

1340D

1429D

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(6) Start backtack key

(7) End backtack key

(8) Continuous backtack key

(9) Thread trimming disable/F1 key

(10) Slow start/F2 key

(11) Half stitch key

3. USING THE OPERATION PANEL (BASIC OPERATIONS)

Power indicator

Stitch No. indicator

Speed indicator

Counter indicator

Locus indicator

Program indicator

1425D

When this key is pressed so that the indicator illuminates, the number of start backtack stitches (0 - 9) in the A and B columns of the display are sewn.

1323D

When this key is pressed so that the indicator illuminates, the number of end backtack stitches (0 to 9) in the C and D columns of the display are sewn. When the treadle is depressed backward, the end backtack stitches are sewn and then the thread is trimmed. If the treadle has not yet been depressed backward, the end backtack function can be set to ON, the number of stitches can be changed and the function can be set back to OFF.

1325D

When this key is pressed so that the indicator illuminates, the number of backtack stitches (0 to 9) in the A, B, C and D columns of the display are sewn continuously. After the sewing machine sews a full cycle of stitches set by A, B, C and D, the thread is trimmed.

1327D

When this key is pressed so that the indicator illuminates, the sewing machine stops in the needle up position without thread trimming being carried out even if the treadle is depressed backward.

1330D

When this key is pressed so that the indicator illuminates, sewing is carried out at 700 sti/min for the first two stitches at the next sewing start after thread trimming. After this, the sewing speed corresponds to the treadle depression amount.

1332D

When the sewing machine is stopped, the needle bar can be moved up and down by pressing this key.

1329D

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3. USING THE OPERATION PANEL (BASIC OPERATIONS)

3-2. Sewing start and end backtack stitches

Setting start backtack stitches

Setting end backtack stitches

0841M

Press the key so that the indicator and the keys

illuminate.

Press the key to set the number of stitches for A and B.

For example, to select 3 stitches and 4 stitches: A-3, B-4

Press the key so that the indicator and the keys

illuminate.

1350D

Press the key to set the number of stitches for C and D.

For example, to select 3 stitches and 2 stitches: C-3, D-2

Start backtacking is carried out. After it has finished, normal sewing continues for as long as the treadle remains depressed.

NOTE:

If the treadle is returned to the neutral position, the sewing machine will continue operating until the set number of start backtack stitches has been sewn.

End backtacking is carried out. After it has finished, the thread is trimmed automatically and the sewing machine stops in the needle up position.

NOTE:

・ If the treadle is depressed backward before sewing of the set number of start backtack

stitches is complete, end backtacking will not be carried out.

・ If thread trimming lock is set, the sewing machine will stop in the needle up position without

thread trimming being carried out.

1351D

2159M

2160M

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3. USING THE OPERATION PANEL (BASIC OPERATIONS)

3-3. Sewing continuous backtack stitches

Sewing continuous backtack stitches

3655M

Press the key so that the indicator and the keys

illuminate.

Press the key to set the number of stitches for A, B, C and D.

For example, to select 4 stitches for A and 5 stitches for B: A-4, B-5 To select 5 stitches for C and 4 stitches for D: C-5, D-4

If the treadle is simply depressed continuously, the number of stitches set for A, B, C and D will be sewn in a single cycle, the thread will be trimmed automatically and then the needle bar will stop in the needle up position.

NOTE:

・ If the treadle is returned to the neutral position while continuous backtacking is being carried

out, the sewing machine will stop at the point where the treadle returns to the neutral position. If the treadle is depressed again, operation will resume from the point where it was interrupted.

・ If thread trimming lock is set, the sewing machine will stop in the needle up position without

thread trimming being carried out.

If "-" is set as the number of stitches for C, the number of stitches set by AB can be sewn D times. For example, if D=3: ABA If D=6: ABABAB

1352D

2159M

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

USING THE OPERATION PANEL (ADVANCED OPERATIONS)

The operations described in this section should only be carried out by a technician.

4-1. Sewing pitch setting method

Any indicator illuminates

Press the key so that the stitch no., speed, counter, locus or

program indicator illuminates.

・ The sewing pitch can be set regardless of whether the stitch no.,

speed, counter, locus or program is being displayed in the 4-digit display. (Refer to the Service Manual for details on programs.)

Press the - /+ keys to change the setting value.

・ When the + key is pressed, the setting value increases by

0.05.

・ When the - key is pressed, the setting value decreases by

0.05.

1353D

NOTE:

The setting range is from 0.05 to 5.00.

The backtack pitch can only be set when the stitch number and sewing speed indicators are illuminated. (Refer to "4-3-2. Backtack sewing speed setting method".)

1354D

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-2. Switching the 4-digit display

・ The 4-digit display can be changed to one of the following four statuses each time the key is pressed.

Stitch no. display or no display -> Speed display -> Counter display -> Locus display

・ When the speed display or counter display appears, you can press the key to switch to another display.

Display mode

Stitch number display

Sewing speed display

Counter display

Flashing Flashing

Locus display

ON ON

Flashing

ON ON Production counter value

ON ON

4-3. Setting the sewing speed

4-3-1. Setting the maximum sewing speed

Press the key so that the indicator illuminates.

・ The maximum sewing speed setting value will appear in the 4-digit

display.

Press the C /D keys to change the setting value.

4-digit display

Maximum sewing speed setting

Backtack sewing speed setting

Lower thread counter warning

Needle replacement counter

ABCD stitch number display

value

value Lower thread counter value

enabled

value

warning enabled Locus setting value

1355D

・ When the D key is pressed, the setting increases by 100.

・ When the C key is pressed, the setting decreases by 100.

NOTE:

The setting range is from 220 to 4000 sti/min.

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-3-2. Backtack sewing speed setting method

Press the key so that the indicator illuminates.

・ The maximum sewing speed setting value will appear in the 4-digit

display.

Press the key.

・ The indicator will illuminate and the setting value for the

backtack sewing speed will appear in the 4-digit display.

1355D

NOTE:

If you press the key once more, the indicator

will switch off and the display will return to the maximum sewing

speed setting value.

Press the C /D keys to change the setting value.

・ When the D key is pressed, the setting increases by 100.

・ When the C key is pressed, the setting decreases by 100.

NOTE:

The setting range is from 220 to 3000 sti/min.

1357D

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-4. Setting the counters

The lower thread counter, production counter and needle replacement counter are available. The three counters can be operated at the same time.

4-4-1. Lower thread counter

The lower thread counter can be used to let you know approximately how much lower thread is remaining. * This function is only displayed when "A09: Lower thread counter operation" is set to "ON". Refer to "4-6-7. Lower thread counter operation".

Press the key so that the indicator illuminates.

・ The lower thread counter value will appear in the 4-digit display.

Press the A key for 2 seconds or more, and then press the C

or D key to set the initial value.

・ When the D key is pressed, the setting value increases by 0.1.

・ When the C key is pressed, the setting value decreases by

0.1.

NOTE:

・ The setting range is from 0.1 to 99.9.

1359D

1360D

<Lower thread counter operation> ・ The lower thread counter can be used to let you know approximately how much lower thread is remaining.

* The lower thread counter should be used as a guide only.

・ The value displayed by the lower thread counter display is reduced by 0.1 from the initial setting value each time the number

of stitches x sewing pitch reaches 0.1 m, and a warning is given when the counter goes below 0.

When the warning occurs, the counter indicator blinks and the buzzer sounds for 5 seconds.

1361D

・ Sewing will be possible even after the treadle is returned to the neutral position and the sewing machine stops. However,

after the treadle has been depressed backward and thread trimming has been carried out, sewing using the treadle will no longer be possible. If the treadle is depressed at this time, “ Ent” will appear in the display. When the treadle is returned to the neutral position, the display will return to the current counter display.

・ If the key is pressed during a warning, the indicator will change to illuminated and sewing can then be

carried out using the treadle.

If the A key is pressed again for 2 seconds or more, the counter display will return to the initial value and counting from

the initial value will be possible.

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-4-2. Production counter

The production counter can be used to let you know how many items have been sewn.

After the thread trimming operation is complete, the counter will be incremented.

Press the key so that the indicator illuminates.

・ The lower thread counter value will appear in the 4-digit

display.

When the key is pressed once, the production counter

will be displayed.

・ The production counter value will appear in the 4-digit

display.

NOTE:

The counter is incremented when the treadle is depressed backward even if thread trimming is set to disabled.

When the production counter is displayed, you can press the C

or D key to adjust the counter value (0 to 9999).

1359D

1362D

・ When the D key is pressed, the counter value increases

by 1.

・ When the C key is pressed, the counter value decreases

by 1.

・ If you press the A key for 2 seconds or more, the counter

value can be reset to "0".

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4-4-3. Needle replacement counter

Press the key so that the indicator illuminates.

・ The lower thread counter value will appear in the 4-digit display.

When the key is pressed two or more times, the needle

replacement counter display will appear.

・ The needle replacement counter value will appear in the 4-digit

Press the A key for 2 seconds or more, and then press the C

or D key to set the initial value.

4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

1359D

display.

1364D

・ When the D key is pressed, the setting value increases by 1.

・ When the C key is pressed, the setting value decreases by 1.

NOTE:

・ The setting range is from 0 to 9999. ・ If an initial value of “0” is set, the needle replacement counter will

not operate.

1365D

<Needle replacement counter operation> ・ The needle replacement counter is reduced by 1 from the initial setting value each time the sewing machine sews 100

stitches, and a warning is given when the counter goes below “0”.

When the warning occurs, the indicator and the indicator flash,

and the buzzer sounds for 5 seconds.

1366D

・ Sewing will be possible even after the treadle is returned to the neutral position and the sewing machine stops. However,

after the treadle has been depressed backward and thread trimming has been carried out, sewing using the treadle will no longer be possible. If the treadle is depressed at this time, “Ent” will appear in the display. When the treadle is returned to the neutral position, the display will return to the current counter display.

・ If the key is pressed during a warning, the indicator and the indicator will change to illuminated and

sewing can then be carried out using the treadle.

If the A key is pressed again for 2 seconds or more, the counter display will return to the initial value and counting from

the initial value will be possible.

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-5. Sewing locus setting method

Sewing locus setting method

Press the key so that the indicator illuminates.

・ The sewing locus setting value will appear in the 4-digit display.

Press the C /D keys to change the setting value.

・ When the D key is pressed, the setting value increases by 1.

・ When the C key is pressed, the setting value decreases by 1.

NOTE:

The setting range is from 0 to 3. 0: The feed dog moves along the standard locus. 1: The feed dog moves along special locus 1. 2: The feed dog moves along special locus 2. 3: The feed dog moves along special locus 3.

1367D

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-6. Setting basic functions

If you hold down the key and press the key while the stitch no., speed, counter, locus or program is displayed,

the following items can be set.

Setting item 3-digit

display

Needle up/down

Thread trimming disable

『A01』『UPdn』『A02』『trdi』

4-digit display

Initial value Reference item

Needle down stop Refer to ”4-6-1”.

None (Thread trimming operation enabled)

Press the key to

make the setting.

Thread wiping

Correction sewing AUTO Auto thread trimming Slow start

Illumination LED brightness Lower thread counter operation Prev. thread away Prev. thread away pitch at 1st stitch Prev. thread away pitch at 2nd stitch Short trailing thread

Short trailing thread sewing speed at 1st stitch Short trailing thread sewing speed at 2nd stitch Short trailing thread pitch at 1st stitch

Short trailing thread pitch at 2nd stitch Short trailing thread pitch at 3rd stitch Short trailing thread direction Standard switch correction sewing

function Function other than standard switch correction sewing 2nd pitch ratio 『A33』『 2Pt』

Correction 2nd pitch ratio 『A34』『A2Pt』 Option switch correction sewing function

Function other than option switch correction sewing

『A03』『 WiP』

『A04』『Corr』『A05』『AUto』『A06』『AtiM』『A07』『SLoW』

『A08』『 LEd』『A09』『UtCt』『A11』『 PtA』『A12』『PtP1』『A13』『PtP2』『A21』『ttSH』

『A22』『ttr1』

『A23』『ttr2』

『A24』『ttP1』『A25』『ttP2』『A26』『ttP3』『A27』『ttCS』『A31』『HSCF』

『A32』『HSoF』

『A35』『oSCF』

『A36』『oSoF』

Specifications with thread wiper: Enabled Specifications without thread wiper: Disabled None

None Refer to the Service Manual. None Refer to the Service Manual. None

Level 5 None None

3.30

2.20 P specifications:

Enabled S specifications: Disabled 1400

400

0.70

1.20 Fw: Forward direction 1: Single correction

sewing 1: Reverse

50 50 1: Single correction

sewing 1: Reverse

Refer to ”4-6-3”.

Press the key to

make the setting.

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

(

4-6-1. Changing the needle stop position

This sets whether the needle bar stops in the needle up stop position or the needle down stop position when the treadle is returned to the neutral position and sewing stops.

Displaying the needle up stop and needle down stop setting values

Setting the needle up stop and needle down stop positions

In sewing standby mode, press the key while holding down

the key to switch to function setting mode.

・ "A01 UPdn" will be displayed.

1369D

・ When the key is pressed, the setting value is displayed.

・ When the D key is pressed, the “UP” display will appear.

・ When the C key is pressed, the “dn” display will appear.

・ When the key is pressed, the initial value will be reset.

Press the key.

Needle down sto

Needle up sto

NOTE:

If the key is pressed once more, the indicator

will switch off and the display will return to the setting item.

1370D

Setting mode will be exited and normal operation will be possible.

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)

4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-6-2. Thread trimming disable

If thread trimming is set to be disabled, thread trimming will not be carried out even when the pedal is depressed backward.

Selecting “A02 Trdi” (thread trimming disable)

In sewing standby mode, press the key while holding

down the key to switch to function setting mode.

・ "A01 UPdn" will be displayed.

Press the - / + keys to select "A02 Trdi".

1369D

Press either.

Displaying the thread trimming disabled setting value

Setting thread trimming to disabled or enabled

Press the key.

(Thread trimming operation enabled)

(Thread trimming disable

・ When the

・ When the - key is pressed, the previous setting is displayed.

・ When the key is pressed, the setting value is displayed.

・ When the D key is pressed, the “on” display will appear.

・ When the C key is pressed, the “oFF” display will appear. ・ When the key is pressed, the initial value will be reset.

NOTE:

If the key is pressed once more, the indicator will switch off and the display will return to the setting item.

Setting mode will be exited and normal operation will be possible.

+ key is pressed, the next setting is displayed.

1371D

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

(

)

4-6-3. Thread wiping

You can set whether thread wiper operation is enabled or disabled.

Selecting “A03 Wip” (thread wiping)

Press either.

Displaying the thread wiping setting value

In sewing standby mode, press the key while holding down

the key to switch to function setting mode.

・ "A01 UPdn" will be displayed.

Press the - / + keys to select "A03 Wip".

・ When the + key is pressed, the next setting is displayed.

・ When the - key is pressed, the previous setting is displayed.

・ When the key is pressed, the setting value is displayed.

1369D

1373D

Setting thread wiping

Press the key.

Thread wiping disabled) (Thread wiping enabled

・ When the D key is pressed, the “on” display will appear.

・ When the C key is pressed, the “oFF” display will appear. ・ When the key is pressed, the initial value will be reset.

NOTE:

If the key is pressed once more, the indicator will switch off and the display will return to the setting item.

Setting mode will be exited and normal operation will be possible.

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-6-4. Correction sewing

When correction sewing is enabled, if the hand switch is pressed while sewing is stopped before thread trimming, one stitch will be sewn and sewing will then stop. * The function can be changed. (Refer to "4-11. Hand switch".)

Selecting “A04 Corr” (correction sewing)

Press either.

Displaying the correction sewing setting value

In sewing standby mode, press the key while holding down

the key to switch to function setting mode.

・ "A01 UPdn" will be displayed.

1369D

Press the - or + key to select "A04 Corr".

・ When the + key is pressed, the next setting is displayed.

・ When the - key is pressed, the previous setting is displayed.

1375D

・ When the key is pressed, the setting value is displayed.

Setting correction sewing

(Correction sewing disabled)

Press the key.

(Correction sewing enabled)

・ When the D key is pressed, the “on” display will appear.

・ When the C key is pressed, the “oFF” display will appear. ・ When the key is pressed, the initial value will be reset.

NOTE:

If the key is pressed once more, the indicator

will switch off and the display will return to the setting item.

Setting mode will be exited and normal operation will be possible.

1376D

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

(

)

(

)

4-6-5. Slow start

If slow start is enabled, occurrences of the thread pulling out can be reduced.

Selecting “A07 SLow” (slow start)

Press either.

Displaying the slow start setting value

In sewing standby mode, press the key while holding down

the key to switch to function setting mode.

・ "A01 UPdn" will be displayed.

Press the - or + key to select "A07 SLow".

・ When the + key is pressed, the next setting is displayed.

・ When the - key is pressed, the previous setting is displayed.

・ When the key is pressed, the setting value is displayed.

1369D

1377D

Setting slow start

Press the key.

Slow start disabled

Slow start enabled

・ When the D key is pressed, the setting value increases in the

order "oFF", "1", "2", "3".

・ When the C key is pressed, the setting value decreases in the

order "3", "2", "1", "oFF".

・ When the key is pressed, the initial value will be reset.

・ Sewing speed for first 4 stitches when slow start is enabled

1: 400, 400, 400, 4000* 2: 400, 400, 4000*, 4000* 3: 700, 700, 4000*, 4000* 4: Set using memory switch Nos. 403 to 406.

* If the maximum sewing speed is set to 4,000 sti/min

NOTE:

If the key is pressed once more, the indicator will switch off and the display will return to the setting item.

Setting mode will be exited and normal operation will be possible.

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4-6-6. Setting the illumination LED light

You can set the brightness of the illumination LED light.

Selecting "A08 LEd" (illumination LED light)

Press either.

Displaying the illumination LED light setting value

Setting the illumination LED light

4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

In sewing standby mode, press the key while holding down

the key to switch to function setting mode.

・ "A01 UPdn" will be displayed.

1369D

Press the - or + key to select "A08 LEd".

・ When the + key is pressed, the next setting is displayed.

・ When the - key is pressed, the previous setting is displayed.

1379D

・ When the key is pressed, the setting value is displayed.

・ When the D key is pressed, the setting value increases from

"1" through to "9".

・ When the C key is pressed, the setting value decreases from

"9" through to "1".

・ When the key is pressed, the initial value will be reset.

Press the key.

(Dark) (Bright)

NOTE:

If the key is pressed once more, the indicator

will switch off and the display will return to the setting item.

Setting mode will be exited and normal operation will be possible.

1380D

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-6-7. Setting lower thread counter operation

The lower thread counter function can be set to enabled or disabled.

Selecting "A09 UtCt" (lower thread counter operation)

Press either.

Displaying the lower thread counter operation setting value

In sewing standby mode, press the key while holding down

the key to switch to function setting mode.

・ "A01 UPdn" will be displayed.

Press the - or + key to select "A09 UtCt".

・ When the + key is pressed, the next setting is displayed.

・ When the - key is pressed, the previous setting is displayed.

・ When the key is pressed, the setting value is displayed.

1369D

1462D

Setting lower thread counter operation

Press the key.

(Lower thread counter disabled)

(Lower thread counter enabled)

・ When the D key is pressed, the “on” display will appear.

・ When the C key is pressed, the “oFF” display will appear.

・ When the key is pressed, the initial value will be reset.

NOTE:

If the key is pressed once more, the indicator will switch off and the display will return to the setting item.

Setting mode will be exited and normal operation will be possible.

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-6-8. Prev. thread away

When "Prev. thread away" is enabled, the pitch at the sewing start can be increased in order to reduce cases of the thread pulling out.

Selecting “A11 PtA” (prev. thread away)

Press either.

Displaying the "Prev. thread away" setting value

Setting "Prev. thread away"

In sewing standby mode, press the key while holding down

the key to switch to function setting mode.

・ "A01 UPdn" will be displayed.

1369D

Press the - or + key to select "A11 PtA".

・ When the + key is pressed, the next setting is displayed.

・ When the - key is pressed, the previous setting is displayed.

1381D

・ When the key is pressed, the setting value is displayed.

・ When the D key is pressed, the “on” display will appear.

Press the key.

("Prev. thread away" function is disabled)

("Prev. thread away" function is enabled)

・ When the C key is pressed, the “oFF” display will appear.

・ When the key is pressed, the initial value will be reset.

NOTE:

If the key is pressed once more, the indicator will switch off and the display will return to the setting item.

1382D

Setting mode will be exited and normal operation will be possible.

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-6-9. Short trailing thread

When short trailing thread is enabled, the trailing length of the thread can be made shorter.

Selecting "A21 ttSH" (short trailing thread)

Press either.

Displaying the short trailing thread setting value

In sewing standby mode, press the key while holding down

the key to switch to function setting mode.

・ "A01 UPdn" will be displayed.

Press the - or + key to select "A21 ttSH".

・ When the + key is pressed, the next setting is displayed.

・ When the - key is pressed, the previous setting is displayed.

・ When the key is pressed, the setting value is displayed.

1369D

1383D

Setting short trailing thread

Press the key.

(Short trailing thread function disabled)

(Short trailing thread function enabled)

・ When the D key is pressed, the “on” display will appear.

・ When the C key is pressed, the “oFF” display will appear.

・ When the key is pressed, the initial value will be reset.

NOTE:

If the key is pressed once more, the indicator

will switch off and the display will return to the setting item.

Setting mode will be exited and normal operation will be possible.

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-6-10. Correction sewing function (1)

When the correction sewing function (A04) is enabled, the hand switch correction sewing function can be set. For details on the functions which can be set, refer to "4-11. Hand switch" for the settings when the hand switch is set as a correction sewing switch.

Selecting "A31 HSCF" (correction sewing function)

In sewing standby mode, press the key while holding down

the key to switch to function setting mode.

・ "A01 UPdn" will be displayed.

1369D

Press the - or + key to select "A31 HSCF".

・ When the + key is pressed, the next setting is displayed.

・ When the - key is pressed, the previous setting is displayed.

Press either.

Displaying the correction sewing function setting value

Setting the correction sewing function

Press the key.

(Correction sewing function disabled)

(Correction sewing function enabled)

1385D

・ When the key is pressed, the setting value is displayed.

・ When the D key is pressed, the setting value increases from

"oFF" to "1" through to "9".

・ When the C key is pressed, the setting value decreases from

"9" through to "1" to "oFF".

・ When the key is pressed, the initial value will be reset.

NOTE:

If the key is pressed once more, the indicator will switch off and the display will return to the setting item.

Setting mode will be exited and normal operation will be possible.

1386D

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-6-11. Correction sewing function (2)

When the correction sewing function (A04) is disabled, the hand switch functions other than correction sewing can be set. For details on the functions which can be set, refer to "4-11. Hand switch" for the settings when the hand switch is set to other than a correction sewing switch.

Selecting "A32 HSoF" (correction sewing function)

In sewing standby mode, press the key while holding down

the key to switch to function setting mode.

・ "A01 UPdn" will be displayed.

1369D

Press the - or + keys to select "A32 HSoF".

・ When the + key is pressed, the next setting is displayed.

・ When the - key is pressed, the previous setting is displayed.

Press either.

Displaying the setting value for a function other than correction sewing

・ When the key is pressed, the setting value is displayed.

Setting a function other than correction sewing

・ When the D key is pressed, the setting value increases from

"oFF" to "1" through to "16".

・ When the C key is pressed, the setting value decreases from

"16" through to "1" to "oFF".

・ When the key is pressed, the initial value will be reset.

NOTE:

If the key is pressed once more, the indicator

(Function other than correction sewing is disabled)

(Function other than correction sewing is enabled)

will switch off and the display will return to the setting item.

Press the key.

Setting mode will be exited and normal operation will be possible.

1387D

1388D

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4-7. Memory switch setting method

Selecting a memory switch number

Previous item

Next item

Selecting a memory switch number which is different from the initial value

In sewing standby mode, press the key while holding down the

・ "001" or the memory switch number which was set previously will

Press the - / + keys to select the number for the memory

switch to be set.

・ When the + key is pressed, the next setting is displayed.

・ When the - key is pressed, the previous setting is displayed.

While pressing the key, press the - / + keys to select

the number for the memory switch which is different from the initial

value.

4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

key to switch to memory switch setting mode.

be displayed.

1389D

1390D

Previous item

Next item

Changing the memory switch setting value

Decreases the value

Confirming the memory switch setting value

Increases the value

・ When the + key is pressed while holding down the key,

the next setting item is displayed.

・ When the - key is pressed while holding down the key,

the previous setting item is displayed.

・ When the D key is pressed, the setting value increases or it

turns ON.

・ When the C key is pressed, the setting value decreases or it

turns OFF.

・ When the key is pressed the initial value will be set.

・ When the key is pressed, the setting value is confirmed.

1390D

1392D

Press the key.

Setting mode will be exited and normal operation will be possible.

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-8. List of memory switch settings

Presser foot lifter and treadle settings (001 to 099)

No.

001 ON/OFF

002 ON/OFF OFF －

003 ON/OFF ON －

004 ON/OFF ON －

010 ON/OFF OFF －

011 0 - 1 0 1

012

013 ON/OFF ON －

014 ON/OFF ON －

015 ON/OFF ON －

Setting

range

0 - 500

(ms)

Initial value

ON : Other

than

Europe and

America /

OFF :

Europe and

America

(ms)

Setting

units

－

(ms)

Presser foot condition when treadle is returned to neutral position after thread trimming ON: Presser foot is raised OFF: Presser foot is not raised (*) The presser foot lifts when No.851 is set to "OFF".

Presser foot condition when operation stops at the neutral treadle position ON: Presser foot is raised OFF: Presser foot is not raised Presser foot raising after treadle is returned to neutral position to stop sewing and is then depressed backward to the 1st step ON : Enabled OFF: Disabled Operation when treadle is depressed backward ON: Thread trimming and end backtack sewing operations are enabled

(However, if thread trimming operation is locked, needle up operations will be carried out without thread trimming.)

OFF: Thread trimming and end backtack sewing operations are disabled

(presser foot lifts when the treadle is depressed backward) Alternating operation of standing operation pedal and treadle (*) For simultaneous operation which includes operation of the presser foot lifter pedal, operation of the standing operation pedal takes priority. ON: Treadle operation is still enabled after standing operation pedal has

been used (alternating operation is possible)

OFF: Treadle operation is disabled after standing operation pedal has

been used Operation when standing up variable speed pedal is ON 0: Sewing speed corresponds to treadle depression amount 1: Operates at the sewing speed for the main section (constant speed)

Delay time from standing pedal turning on until motor starts operating

Stop function using the work clamp pedal during standing operation when the AUTO function is on ON: Sewing is interrupted when presser foot lifter pedal turns on (pause

operation) (*) This function is disabled during start backtacking. OFF: No operation Pause function using the high-speed pedal during standing operation when the AUTO function is on ON: When the high-speed pedal turns on, sewing is momentarily stopped,

and it is resumed when the pedal turns off. (*) This function is disabled when No. 010 is set to "ON". (*) This function is disabled during start backtacking. OFF: No operation Presser foot lifting operation from thread trimming pedal after thread is trimmed during standing operation ON: Presser foot can be raised and lowered (*) If No.051 is set to "ON", thread trimming pedal operation is disabled

after the presser foot lifter pedal has been operated during standing operation.

OFF: No operation (only possible using presser foot lifter pedal)

Setting details

S-7250A

Page 47

Sewing machine motor settings (100 to 199)

No.

100 OFF, 1 - 3 OFF 1

101 1 - 5 1 1

102

103

Setting

range

-20 - 10

(Degrees) 0 (Degrees)1 (Degrees)

-10 - 10

(Degrees) 0 (Degrees)1 (Degrees)

Initial value

Setting

units

4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

Pedal response switching settings immediately after sewing has started OFF: No switching 1: Slow start only when sewing starts after thread trimming 2: Slow start only when sewing starts after sewing has been paused 3: Slow start always when sewing starts Pedal response immediately after sewing has started (The larger the value, the slower the speed when sewing starts.) * When No. 100 is set to "OFF", nothing is displayed. (The setting is

disabled.) Needle up stop position correction value Needle up stop position = Needle up stop position initial setting value + Upper shaft reference position correction value + Needle up stop position correction value Needle down stop position correction value Needle down stop position = Needle down stop position initial setting value + Upper shaft reference position correction value + Needle down stop position correction value

Feed motor settings (200 to 299)

No.

200

201

202

203

204

205

206

Setting

range

50 - 150

(%)

50 - 150

(%)

50 - 150

(%)

50 - 150

(%)

50 - 150

(%)

50 - 150

(%)

50 - 150

(%)

Initial value

100

(%)

100

(%)

100

(%)

100

(%)

100

(%)

-3: 100

-5: 97 (%)

(%)

Setting

units

(%)

Forward direction pitch correction ratio

Reverse direction pitch length correction ratio

Start backtacking B pitch correction ratio

End backtacking C pitch correction ratio

Special locus 1 pitch correction ratio

Special locus 2 pitch correction ratio

Special locus 3 pitch correction ratio

Panel operation settings (300 to 399)

No.

300 1 - 3 1 1

312 0 - 2 0 1

Setting

range

Initial value

Setting

units

Operation after lower thread counter warning 1: Sewing can continue until thread trimming is carried out 2: After sewing stops, it cannot continue until the [ENTER] key is pressed

and the warning is canceled.

3: If the counter goes below "0", sewing stops, and the warning operation

for a setting of "2" occurs.

Feed pitch display mode 0: mm display 1: stitch per inch display 2: stitch per 30 mm display

Setting details

S-7250A

Page 48

4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

Sewing program settings (400 to 499)

No.

400 ON/OFF OFF －

401 ON/OFF ON －

Setting

range

Initial value

Setting

units

Stopping while start backtacking is in progress, and speed during start backtacking ON: When the treadle is returned to the neutral position, start backtacking

can be stopped before it is finished, and the speed during start backtacking becomes the speed corresponding to the treadle depression amount (low speed - start backtacking speed)

OFF: When the treadle is returned to the neutral position, start backtacking

ends, sewing stops and the sewing speed becomes the start backtacking speed (constant)

Feed direction when sewing machine motor is stopped immediately after start backtacking is complete OFF: Sewing machine motor stops after start backtacking

is complete

(*) If No. 400 is set to "OFF", operation occurs when the

treadle is depressed slightly.

ON: After start backtack sewing, the feed moves forward,

then the sewing machine motor stops.

403

404

405

406

408 2 - 6 2 1

300 - 4000

(sti/min)

300 - 4000

(sti/min)

300 - 4000

(sti/min)

300 - 4000

(sti/min)

4000

(sti/min)

4000

(sti/min)

4000

(sti/min)

4000

(sti/min)

100

(sti/min)

100

(sti/min)

100

(sti/min)

100

(sti/min)

1st stitch sewing speed for slow start

2nd stitch sewing speed for slow start

3rd stitch sewing speed for slow start

4th stitch sewing speed for slow start

Repeat pattern when start backtacking sewing pattern (AB) is selected 2: A - B 3: B - A - B 4: A - B - A - B *Same as AB (x2) 5: B - A - B - A - B 6: A - B - A - B - A - B *Same as AB (x3)

Setting details

Operation mode for manual production counter increment function using hand switch

409 0 - 1 0 1

0: Counter can be incremented at any time 1: Counter can only be incremented after sewing stops and thread has

been trimmed

S-7250A

Page 49

Standard device settings (500 to 599)

No.

500 OFF, 1 - 3 1 1

501 OFF, 1 - 2 OFF 1

502

503

504

505

506

507

508

509

Setting

range

90 - 270

(Degrees)

270 - 430

(Degrees)

-50 - 50

(Degrees) 0 (Degrees)

-50 - 50

(Degrees) 0 (Degrees)

-50 - 50

(Degrees) 0 (Degrees)

-50 - 50

(Degrees) 0 (Degrees)

-50 - 50

(Degrees) 0 (Degrees)

-50 - 50

(Degrees) 0 (Degrees)

Initial value

180

(Degrees)

320

(Degrees)

Setting

units

Presser foot lifter SW function OFF: Disabled 1: Presser foot lifter switch 2: Puller switch (switching) 3: Puller switch * Puller operation is enabled when No. 960 is set to "1", and it does not

operate when set to other than "OFF". Thread holder operation setting OFF: Thread holder does not operate 1: On according to the timing set by No. 502, and off according to the timing

2: On together with starting of machine motor, and off according to the timing

Thread presser ON timing (upper shaft angle)

1 Feed timing for 1st stitch at sewing start *1

1 Feed timing for 2nd stitch at sewing start *1

1 Feed timing for 3rd stitch at sewing start *1

1 Feed timing for 1st stitch at sewing end *2

1 Feed timing for 2nd stitch at sewing end *2

1 Feed timing for 3rd stitch at sewing end *2

(*) When No. 501 is set to "OFF" or "2", nothing is displayed. (The setting is

Thread presser OFF timing (upper shaft angle) (*) When No. 501 is set to "OFF", nothing is displayed. (The setting is

4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

set by No. 503

disabled.)

Setting details

S-7250A

Page 50

4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-9. Reading and writing data using USB media

Programs and memory switch data can be copied between sewing machines by means of USB media.

CAUTION

Turn off the power before connecting the USB memory.

Do not connect anything to the USB port other than the USB memory. If this is not observed, problems with operation may result. Attach the cap after use.

USB cap

USB port

1. Press the - / + keys to select the item to read/write.

2. Press the key to run the selected read/write item.

1. First connect the USB media to the sewing machine.

2. While pressing the key, turn on the power switch.

・ "B01 MAIn" will be displayed.

1464D

1465D

3. When the key is pressed, normal sewing machine operation will be possible.

The read/write items that can be selected are as follows.

3-digit

display

『B81』『PRGR』 Read all programs 『B82』『PRGW』『B83』『MSWR』 Read all memory switches 『B84』『MSWW』 Write all memory switches 『B85』『ADTR』 Read all data 『B86』『ADTW』 Write all data

『B87』

『B88』『ERRW』 Write error log

Create folders for USB media

Memory switches ISMMSW.SEW Same as above

Cycle programs ISMCYC.SEW Same as above

Program functions in common ISMCOM.SEW Same as above

Design stitches ISMDST.SEW Same as above

Hand switch ISMHSW.SEW Same as above

Production data P*******.LDT Same as above

4-digit

display

Write all programs

『PDIW』

Data type File name Folder name

Program ISMUPG.SEW

Error log

Write production information

Setting item Read/write direction

USB media → (Panel) →Sewing machine USB media ← (Panel) ←Sewing machine USB media → (Panel) →Sewing machine USB media ← (Panel) ←Sewing machine USB media → (Panel) →Sewing machine USB media ← (Panel) ←Sewing machine USB media ← (Panel) ←Sewing machine

USB media ← (Panel) ←Sewing machine

¥BROTHER¥ISM¥ISMDL** (** is the value for MSW-750) (Refer to the Service Manual for details on MSW-750.)

E*******.LDT M*******.LDT

¥BROTHER¥ISM¥ISMLDT¥

S-7250A

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4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-10. Resetting all settings to their defaults

If the sewing machine stops operating normally, the cause may be that an incorrect setting may have been made for the memory data by means of memory switches, for instance. In such cases, it may be possible to restore normal operation by following the steps given below to initialize the memory setting data.

1. While pressing the key, turn on the power switch.

The mode will switch to initialization mode and "C01 ALLC" will appear in the display.

2. Press the - / + keys to select the item to be initialized.

3-digit display 4-digit display Initialization item

『C01』『ALLC』『C02』『MSWC』『C03』『PGMC』『C04』『PDIC』

3. Press the key for 2 seconds or more.

When initialization is complete, the 4-digit display will change to show "End", and then after one second it will switch back to

the previous display.

4. Press the key.

Initialization mode will be exited and normal sewing machine operation will then be possible.

* For details on initialization items other than “C01 ALL”, refer to the Service Manual.

Clear all

Memory switch initialization

Program initialization

Production data initialization

S-7250A

Page 52

4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-11. Hand switch

The following functions can be set for the hand switch. When the correction sewing setting is "ON", the hand switch operates as a correction sewing switch, and when the correction sewing setting is "OFF", the hand switch operates as a switch for functions other than correction sewing. (Refer to "4-6-10. Correction sewing function (1)" for details on changing the correction sewing settings.)

The hand switch and the optional hand switch cannot be pressed at the same time. (The one which was pressed first will be activated.)

Optional hand switch (optional part)

Hand switch

●

Settings for correction sewing switch (This setting is enabled when the correction sewing setting (A04) is "ON".)

Settings

for

correction

sewing

switch

(*1) Set the 2nd correction pitch separately. (Refer to "4-11-2. Setting the 2nd correction pitch".)

Setting

value

OFF Disabled

1 Single correction sewing Stops after sewing a single stitch. 2 Continuous correction sewing If the switch is kept pressed, sewing continues. 3 Single stitch correction sewing at 2nd correction

pitch (*1)

4 Continuous correction sewing at 2nd correction

pitch (*1) 5 Reverse single correction sewing Stops after sewing a single stitch. 6 Reverse continuous correction sewing If the switch is kept pressed, sewing continues. 7 Half stitch correction sewing Stops after half stitch sewing. 8 Reverse single stitch correction sewing at 2nd

correction pitch (*1) 9 Reverse continuous correction sewing at 2nd

correction pitch (*1)

Function Setting details

Stops after sewing a single stitch.

If the switch is kept pressed, sewing continues.

Stops after sewing a single stitch.

If the switch is kept pressed, sewing continues.

1431D

S-7250A

Page 53

4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

●Settings for other than correction sewing switch (This setting is enabled when the correction sewing setting (A04) is "OFF".)

Settings for other

than

correction

sewing

switch

(*2) Set the 2nd pitch separately. (Refer to "4-11-3. Setting the 2nd pitch".) (*3) When using this setting, "Settings for correction sewing switch" are disabled, even if the correction sewing setting (A04) is ON.

Setting

value

OFF Disabled

1 Reverse

2 Second pitch (*2) Changes to 2nd pitch while the switch is being pressed.

3 Second Pitch (switching) (*2)

4 Thread trimming

5 Presser foot lifter

6 Presser foot lifter (switching)

7 Single end backtack cycle cancel

8 Standard locus

9 Standard locus (switching)

10 Special locus 1

11 Special locus 1 (switching)

12 Special locus 2

13 Special locus 2 (switching)

14 Special locus 3

15 Special locus 3 (switching)

Production counter manual count

increase (*3)

Function Setting details

Feed moves in reverse while the switch is being pressed.

Switches between second pitch and main pitch each time the switch is pressed.

・When the switch is pressed, thread trimming is carried

out.

・ When this function is selected, the hand switch

operates as a thread trimming switch even if the correction sewing icon is turned on.

・ If the switch is pressed while tread trimming is

stopped, the presser foot is raised.

・While tread trimming is stopped, the presser foot is

raised and lowered each time the switch is pressed.

・This is enabled when the end backtack key is on. ・If you press the switch and then depress the treadle

backward while the sewing machine is stopped, the thread will be trimmed without end backtacking being carried out.

・End backtacking is only canceled once. Changes to standard locus while the switch is being

pressed. Switches between the locus which is set and the standard locus each time the switch is pressed. Changes to special locus 1 while the switch is being pressed. Switches between the locus which is set and special locus 1 each time the switch is pressed. Changes to special locus 2 while the switch is being pressed. Switches between the locus which is set and special locus 2 each time the switch is pressed. Changes to special locus 3 while the switch is being pressed. Switches between the locus which is set and special locus 3 each time the switch is pressed. The production counter increases by 1 each time the switch is pressed while sewing is stopped.

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Page 54

4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-11-1. Hand switch function setting

In sewing standby mode, press the key while holding down

the key to switch to function setting mode.

・ "A01 UPdn" will be displayed.

Set to A31 or A32

Press the - / + keys to set to A31 or A32, and then press the

key to select.

Menu No. Setting details

A31 Settings for correction sewing switch

A32

Press the D / C keys to select the desired setting value.

・ When the key is pressed, the initial value will be reset.

・ When the key is pressed, the mode returns to function

setting mode.

・ When the key is pressed, the mode returns to sewing standby

Select the setting

mode.

1369D

Settings for other than correction sewing switch

1397D

1398D

S-7250A

Page 55

4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-11-2. 2nd correction pitch setting

Normally, correction sewing is carried out at the currently-set sewing pitch. However, when "Correction sewing at 2nd correction pitch" or "Reverse correction sewing at 2nd correction pitch" is set for carrying out correction sewing, then correction sewing is carried out at the pitch which is set below.

In function setting mode, press the - / + keys to set A34, and

then press the key to select.

Set to A34

Set the ratio.

Press the D / C keys to set the ratio with respect to the

current pitch.

The setting range is from 10% to 250%.

・ When the key is pressed, the initial value will be reset.

・ When the key is pressed, the mode returns to function

setting mode.

・ When the key is pressed, the mode returns to sewing standby

mode.

1399D

1400D

4-11-3. 2nd pitch setting

If "2nd pitch" has been set and the hand switch is pressed during sewing, the stitch pitch will change to the pitch set as follows.

In function setting mode, press the - / + keys to set A33, and

then press the key to select.

Set to A33

Set the ratio.

Press the D / C keys to set the ratio with respect to the

current pitch.

The setting range is from 10% to 250%.

・ When the key is pressed, the initial value will be reset.

・ When the key is pressed, the mode returns to function

setting mode.

・ When the key is pressed, the mode returns to sewing standby

mode.

4-11-4. Menu numbers for setting functions for the hand switch

When setting functions for the hand switch, the menu numbers and setting contents are as given below.

Menu No. Setting details

A31 A32 Settings for other than correction sewing switch A33 2nd pitch setting Settings for other than correction sewing switch A34 2nd correction pitch setting Settings for correction sewing switch A35 A36 Settings for other than correction sewing switch

Hand switch setting

Optional hand switch setting

S-7250A

Settings for correction sewing switch

1401D

1402D

Page 56

5. CLEANING

CAUTION

Turn off the power switch before carrying out these operations. The machine may operate if the treadle is depressed by mistake, which could result in injury.

Be sure to wear protective goggles and gloves when handling the grease so that it does not get into your eyes or onto your skin. Otherwise inflammation can result. Furthermore, do not drink the oil or eat the grease under any circumstances. Diarrhea or vomiting may result. Keep the oil out of the reach of children.

Secure the table so that it will not move when tilting back the machine head. If the table moves, it may crush your feet or cause other injuries.

The following cleaning operations should be carried out each day in order to maintain the performance of this machine and to ensure a long service life. Furthermore, if the sewing machine has not been used for a long period of time, carry out the following cleaning procedures before using it again.

1. If the oil level drops below the lower reference line (2) on the oil cover (1), be sure to replenish the oil. (Refer to “2-3. Lubrication”.)

1432D

2. Return the machine head to its original position.

3. Replace the needle if it is bent or if the tip is broken.

4. Check that the upper threads have been threaded correctly.

5. Carry out a test sewing.

1433D

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6. STANDARD ADJUSTMENTS

CAUTION

Maintenance and inspection of the sewing machine should only be carried out by a qualified technician.

Ask your Brother dealer or a qualified electrician to carry out any maintenance and inspection of the electrical system.

If any safety devices have been removed, be absolutely sure to re-install them to their original positions and check that they operate correctly before using the machine.

Secure the table so that it will not move when tilting back the machine head. If the table moves, it may crush your feet or cause other injuries.

Turn off the power switch and disconnect the power cord plug at the following times. The machine may operate if the treadle is depressed by mistake, which could result in injury.

・ When carrying out inspection, adjustment and ・ When replacing consumable parts such as the

Always be sure to turn off the power switch and then wait one minute before opening the motor cover. If you touch the surface of the motor, it may cause burns.

If the power switch needs to be left on when carrying out some adjustment, be extremely careful to observe all safety precautions.

6. STANDARD ADJUSTMENTS

maintenance rotary hook and knives

6-1. Arm thread guide R

Becomes greater

Becomes less

The standard position of arm thread guide R (1) is the position where the screw (2) is in the center of the adjustable range for arm thread guide R (1).

NOTE:

To adjust the position, loosen the screw (2) and then move arm thread guide R (1).

・ When sewing heavy-weight material, move arm thread

guide R (1) to the left. (The thread take-up amount will become greater.)

・ When sewing light-weight material, move arm thread

guide R (1) to the right. (The thread take-up amount will become less.)

1434D

S-7250A

Page 58

6. STANDARD ADJUSTMENTS

6-2. Presser foot height

Needle

1435D

The standard height of the presser foot (1) is 6 mm when the presser foot (1) is raised by means of the lifting lever (2).

1. Loosen the nut (3), and then loosen the adjustment screw (4) so that there is no pressure applied to the presser foot.

2. Raise the presser foot (1) by using the lifting lever (2).

3. Remove the rubber cap (5) from the face plate.

4. Loosen the bolt (6) and then move the presser bar (7) up or down until the presser foot (1) is at the standard height of 6 mm.

5. Tighten the bolt (6).

6. Install the rubber cap (5).

7. Adjust the presser foot pressure using the presser adjusting screw (4), and then tighten the nut (3).

NOTE:

After adjusting, check that the needle moves down into the center of the groove in the presser foot.

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Page 59

6-3. Adjusting the feed dog height

<-[]03>

Becomes higher

0.8mm

<-[]03A>

0.8mm

<-[]05>

1.2mm

6. STANDARD ADJUSTMENTS

1. Turn on the power.

2. Turn off start backtacking, best PFM mode, slow start and special locus.

3. Set the feed pitch to 5 mm.

4. Press and hold the ENTER key (1) and then press the SEL key (2).

* The standard height of the feed dog (3) when it is raised as

far as possible above the surface of the needle plate is 0.8 mm for -[]03 specifications, 0.8 mm for -[]03A specifications and 1.2 mm for -[]05 specifications.

5. Turn the machine pulley to move the feed dog (3) to its highest position above the needle plate.

6. Tilt back the machine head.

7. Loosen the screw (4).

8. Turn the feed lifting shaft crank (5) to move the feed bracket (6) up and down.

9. Tighten the screw (4).

10. After adjusting, press the SEL key (2).

Becomes lower

1436D

S-7250A

Page 60

6. STANDARD ADJUSTMENTS

6-4. Adjusting the feed dog angle

Standard

Raise the

front

Lower the

front

1437D

1. Turn on the power.

2. Turn off start backtack sewing, best PFM mode, slow start and special locus.

3. Set the feed pitch to 5 mm.

4. Press and hold the ENTER key (1) and then press the SEL key (2).

* The standard angle for the feed dog (3) when it drops until it

is aligned with the top of the needle plate is when the “○” mark on the shaft (4) is aligned with the feed rocker bracket arm (5) and the feed dog (3) is parallel to the needle plate.

5. Turn the machine pulley to move the feed dog (3) to its highest position above the needle plate.

6. Tilt back the machine head.

7. Loosen the set screw (6).

8. Turn the shaft (4) in the direction of the arrow within a range of 90° with respect to the standard position.

・ In order to prevent puckering, lower the front of the feed

dog (3). (Fig. [B])

・ In order to prevent the material from slipping, raise the

front of the feed dog (3). (Fig. [A])

9. Securely tighten the set screw (6).

10. After adjusting, press the SEL key (2).

NOTE:

The height of the feed dog (3) will change after the angle has been adjusted, so it will be necessary to re-adjust the height of the feed dog (3).

6-5. Adjusting the needle bar height

1438D

Reference line (a) on the needle bar (1) should be aligned with the lower edge of the needle bar bush (2) as shown in the illustration when the needle bar (1) is at its lowest position.

1. Turn the machine pulley to set the needle bar (1) to its lowest position.

2. Remove the rubber cap (3) from the face plate.

3. Loosen the screw (4) and move the needle bar (1) up or

down to adjust its position.

4. Securel y tighten the screw (4).

5. Install the rubber cap (3).

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Page 61

6-6. Adjusting the needle and feed mechanism timing

1. Turn on the power.

2. Turn off start backtack sewing, best PFM mode, slow start and special locus.

3. Set the feed pitch to 5 mm.

4. Press and hold the ENTER key (1) and then press the SEL key (2).

<-[]03, -[]03A> <-[]05>

Approx. 1 mm

<-[]03A>

Flush with top of needle plate

Needle timing is advanced

(Standard)

Approx. 3 mm

Needle timing is retarded

1439D

* The illustration at left shows the standard position for the

needle tip when the feed dog (3) is lowered from its highest position until it is flush with the top of the needle plate (4).

5. Remove the side plate.

6. Loosen the two set screws (6) of the vertical cam (5), and then turn the vertical cam (5) slightly to adjust the timing.

・ To advance the needle timing, turn in the direction of

<A>. To retard the needle timing, turn in the direction of <B>.

・ To prevent material slippage from occurring, retard the

needle timing. (Fig. [B])

・ To improve thread tightening, advance the needle

timing. (Fig. [A])

NOTE:

If the vertical cam (5) is turned too far in the direction of <A>, it may cause the needle to break.

7. After adjusting, securel y tighten the set screw (6).

8. Install the side plate.

9. After adjusting, press the SEL key (2).

6. STANDARD ADJUSTMENTS

S-7250A

Page 62

6. STANDARD ADJUSTMENTS

6-7. Needle and rotary hook timing

2290M

0.5 - 0.7 mm

<-[]03>

1.8 mm

<- []03A,-[]05>

2.2 mm

2291M

3869M

The tip of the rotary hook (3) should be aligned with the center of the needle (4) when the needle bar (1) moves up 1.8 mm (2.2 mm for –[]03A and –[]05 specifications) from its lowest position to the position where reference line (b) is aligned with the lower edge of the needle bar bush (2) as shown in the illustration. (The distance from the upper edge of the needle hole to the rotary hook tip will be 0.5 to 0.7 mm at this time.)

1. Turn the machine pulley to raise the needle bar (1) from its lowest position until reference line (b) is aligned with the lower edge of the needle bar bush (2) as shown in the illustration.

2. Loosen the three set screws (5), and then align the rotary hook tip (3) with the center of the needle (4). The distance between the tip of the rotary hook (3) and the needle (4) should be approximately 0 - 0.05 mm at this time.

3. Securel y tighten the three set screws (5).

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Page 63

6. STANDARD ADJUSTMENTS

6-8. ADJUSTING THE ROTARY HOOK LUBRICATION AMOUNT

CAUTION

Be careful not to touch your fingers or the lubrication amount check sheet against moving parts such as the rotary hook or the feed mechanism when checking the amount of oil supplied to the rotary hook. If care is not taken, injury may result.

Use the following procedure to check the amount of oil being supplied to the rotary hook when replacing the rotary hook or when changing the sewing speed.

Approx. 70 mm

Too much

5 – 10 mm

Correct lubrication

amount

Approx. 25 mm

Spattered oil

Too little

Less oil

2303M

Bed

2304M

0935M

More oil

1440D

1. Remove the thread from all points from the thread take-up lever to the needle.

2. Use the lifting lever to lift the presser foot.

3. Run the machine at the normal sewing speed for approximately 1 minute without sewing any material (following the same start/stop pattern as when actually sewing).

4. Place the lubrication amount check sheet (1) to the left of the rotary hook (2) and hold it there. Then run the sewing machine at the normal sewing speed for 8 seconds. (Any type of paper can be used as the lubrication amount check sheet (1).)

5. Check the amount of oil which has spattered onto the sheet.

If adjustment is necessary, carry out the following operations in "Adjusting the lubrication amount".

1. Tilt back the machine head.

2. Turn the rotary hook adjusting screw (3) to adjust the lubrication amount.

・ If the rotary hook adjusting screw (3) is turned

clockwise, the lubrication amount becomes greater.

・ If the rotary hook adjusting screw (3) is turned

counterclockwise, the lubrication amount becomes smaller.

3. Check the lubrication amount again according to the procedure given in "Checking the lubrication amount" above.

NOTE:

Turn the rotary hook adjusting screw (3) and check the lubrication amount repeatedly until the lubrication amount is correct.

4. Check the lubrication amount again after the sewing machine has been used for approximately two hours.

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Page 64

6. STANDARD ADJUSTMENTS

6-9. Thread trimming (Other than short trailing thread specifications)

1. Turn off the power switch.

2. Remove the presser foot, needle plate and feed dog.

3. Tilt back the machine head.

4. Loosen the scre w (2) of the thread trimmer lever (1).

1441D

1459D

5. Install the movable knife (4) to the movable knife holder (5) with the two screws (3).

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Page 65

1 mm - 1.5 mm

1442D

1443D

6. STANDARD ADJUSTMENTS

1. Turn the machine pulley, and then push the plunger (1) of the thread trimming solenoid with your finger.

2. In this condition, turn the machine pulley until the roller shaft (4) of the thread trimmer cam lever assembly (3) is sitting on top of the thread trimmer cam (2), then move the thread trimmer lever (7) to adjust its position so that the tip of the fixed knife (5) and the blade of the movable knife (6) are meshed by 1 to 1.5 mm, and then tighten the screw (8).

* Tighten the screw (8) so that there is no play in the

forked shaft (9).

* T he lower thread finger (10) must be underneath the

movable knife (6).

3. Install the feed dog, needle plate and presser foot.

S-7250A

Page 66

6. STANDARD ADJUSTMENTS

(a)

Lowest position of needle bar

Reference line

Direction of cam rotation

- 1.0 mm

0.5 mm

Raised 5 mm

Reference line (b)

Should not touch

1444D

1. Raise the needle bar 5 mm from its lowest position so that the reference line (b) is aligned with the bottom edge of the needle bar bush, and then push the plunger (1) of the thread trimmer solenoid in the direction of the arrow with your finger. Adjust the position of the thread trimmer cam (2) at this time so that the roller shaft (4) of the thread trimming cam lever assembly (3) touches the hollow (c) of the thread trimmer cam (2) and so that the clearance between the edge of the thread trimmer (2) and the roller (4) is 0.5 to

1.0 mm, and then tighten the set screw (5). (Fig. [A])

2. Check that the edge of the thread trimmer cam (2) and the roller shaft (4) do not touch when the roller shaft (4) returns to the right. (Fig. [B])

* Tighten the two set screws (5) to approximately 4 N.m.

S-7250A

Page 67

6. STANDARD ADJUSTMENTS

6-10. Thread trimming (Short trailing thread specifications)

1. Turn off the power switch.

2. Remove the presser foot, needle plate and feed dog.

3. Tilt back the machine head.

4. Loosen the screw (2) of the thread trimmer lever (1). (This will allow the upper and lower knife holders and the needle bar mechanism to operate independently.)

1445D

1446D

5. Install the lower knife (4) to the lower knife holder (5) with the two screws (3).

6. Install the upper knife (8) with the two screws (6) and (7).

* Install the upper knife (8) so that it is almost parallel to the

ridge line on the mounting surface of the upper knife holder (9).

* If the upper knife (8) is tilted forward, the knife pressure will

Back

Parallel

increase, and if it is tilted backward, the knife pressure will decrease.

* After adjusting, operate the upper and lower knife holders

by hand and check that the thread can be trimmed.

Front

* If using thick thread, or if the thread is not being trimmed,

adjust the tilt of the upper knife (8) forward.

* Tilt the upper knife (8) forward slightly (about 0.3 mm) so

that the ridge line on the mounting surface of the upper knife holder (9) is slightly visible. (The head of the screw (7) is pan-shaped, and so the upper knife (8) can pivot on this screw when it is tilted.) Be careful not to tilt it too much, otherwise the upper knife will go underneath the lower knife, and damage may result.

1449D

S-7250A

Page 68

6. STANDARD ADJUSTMENTS

2 mm

1447D

1448D

1445D

7. Turn the machine pulley while the thread trimmer solenoid is still turned on so that the thread trimmer cam (10) moves the thread trimmer cam roller (11) to its maximum displacement position.

* Make sure that the thread trimmer solenoid does not turn

off and does not return during this step.

8. Set the maximum meshing amount for the upper and lower knives to 2 mm.

* Turn the thread trimmer lever (1) to align the tip of the

upper knife (8) with the center of the index mark (12) on the lower knife (4).

* Make sure that the tip of the upper knife (8) does not go

past the index mark (12).

9. Tighten the screw (2) of the thread trimmer lever (1).

* Make sure that there is no play in the thrust direction in the

forked shaft (13) of the thread trimmer lever (1) (see illustration on page 7).

S-7250A

Page 69

Lowest position of needle ba

Reference line (a)

Direction of cam rotation

- 1.0 mm

0.5 mm

6. STANDARD ADJUSTMENTS

Raised 6 mm

1. Turn the machine pulley to raise the needle bar 6 mm from its lowest position (reference line (a) position) so that reference line (b) is aligned with the bottom edge of the needle bar bush.

Reference line (b)

0958D

2. At the above position, push the plunger (1) of the thread trimming solenoid with your finger in the direction of the arrow. Adjust the position of the thread trimmer cam (2) at this time so that the roller shaft (4) of the thread trimming cam lever assembly (3) touches the hollow (c) of the thread trimmer cam (2) and so that the clearance between the edge of the thread trimmer (2) and the roller (4) is 0.5 to

1.0 mm, and then tighten the set screw (5). (Fig. [A])

3. Check that the edge of the thread trimmer cam (2) and the roller shaft (4) do not touch when the roller shaft (4) returns to the right. (Fig. [B])

* Tighten the two set screws (5) to approximately 4 N.m.

Should not touch

1450D

S-7250A

Page 70

7. TROUBLESHOOTING

・ Please check the following points before calling for repairs or service. ・ Simplified details can be checked on the panel. (Menu → Troubleshooting) ・ If the following remedies do not fix the problem, turn off the power switch and consult a qualified technician or the place of

purchase.

DANGER

Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet

before opening the control box cover. Touching areas where high voltages are present can result in severe injury.

CAUTION

Turn off the power switch and disconnect the power cord before carrying out these operations. The machine may operate if the treadle is depressed by mistake, which could result in injury.

7-1. Sewing

Items with a "*" in the "Page" column should only be checked by a qualified technician.

Problem Possible cause Page

1 Upper thread is not tight.

0573M

2 Lower thread is not tight.

0574M

3 Loops appear in seam.

0977M

・ Is the upper thread tension too weak? Is the lower thread tension too

strong?

Adjust the lower thread tension or upper thread tension. Try pressing the special locus key and selecting No. 1.

・ Is the upper thread tension too strong? Is the lower thread tension too

weak?

Adjust the lower thread tension or upper thread tension.

・ Is the thread path not smooth enough?

Use a file with a fine grain or sandpaper to polish smooth the thread path.

・ Is the bobbin turning smoothly?

Pull out the lower thread to check that there is no slackness in the thread tension, or replace the bobbin or bobbin case. Try pressing the special locus key and selecting No. 1.

4 Skipped stitches occur

while sewing

0470M

・ Is the needle tip bent? Is the needle tip blunt?

If the needle tip is bent or blunt, replace the needle.

・ Is the needle properly installed?

If it is incorrect, install the needle correctly.

・ Is the machine properly threaded?

If it is incorrect, thread the thread correctly.

・ Is the presser foot pressure too weak?

Adjust the presser foot pressure.

・ Is the needle too thin?

Replace the needle with a needle that is one rank thicker.

・ Is the presser foot too high?

Adjust the height of the presser foot.

・ Is the thread take-up spring too weak?

Adjust the tension of the thread take-up spring.

・ Is the needle and rotary hook timing correct?

Adjust the height of the needle bar. Adjust the clearance between the needle and the tip of the rotary hook.

S-7250A

49*

51*

53*

Page 71

Problem Possible cause Page

5 Skipped stitches at sewing

start Thread unraveling at sewing start.

6 Large bird's nests are

forming at the sewing start.

0749M

7. TROUBLESHOOTING

・ Is the thread take-up spring tension too strong?

Reduce the tension of the thread take-up spring.

・ Is the thread take-up spring operating range too large?

Lower the position of the thread take-up spring.

・ Is the trailing length of the upper thread too short after thread

trimming?

Adjust the pretension.

・ Are the threads not being trimmed cleanly?

Sharpen the fixed knives, or replace the fixed and movable knives if necessary. Replace the movable knife.

・ Is the needle too thick?

Replace the needle with a needle that is one rank thinner.

・ Is the length of thread trailing out from the bobbin case after thread

trimming too short?

If the bobbin is spinning loosely, replace the anti-spin spring in the bobbin case.

・ Is the sewing speed too fast at the sewing start?

Use the slow start key.

・ Is the needle up stop position too high?

Adjust the needle up stop position.

・ Is the upper thread trailing length too short after thread trimming?

Turn on the "Prev. thread away" function.

・ If the thread is pulling out at the sewing start, try the following

remedies.

1. Check the upper thread trailing length.

2. Set the slow start number to "3" or less.

3. Re-adjust the upper thread trailing length to make it longer.

4. Select "Prev. thread away PARA" from "Function setting". (Refer to "4-6. Setting basic functions".)

(1) Set the 2nd stitch pitch to "3". (2) Increase the current stitch pitch settings for the 1st and

2nd stitches by about 0.5 to 1.

・ Is the needle hole in the needle plate too large for the needle being

used?

Replace the needle place with one with a needle hole that is one rank thinner.

・ Is the presser foot groove too wide?

Replace the presser foot with one that has a narrower groove so that it presses the material at the needle drop position.

・ Is the sewing machine starting to sew before the presser foot has

dropped?

Lower the presser foot before starting sewing.

・ Is the presser foot being raised before the sewing machine has

stopped sewing?

Raise the presser foot after the sewing machine has stopped sewing.

・ Is the upper thread trailing length too long after thread trimming?

Increase the tension of the pre-tension.

55*

14・24・29*

25*

29*

S-7250A

Page 72

7. TROUBLESHOOTING

Problem Possible cause Page

7 Uneven seam

8 Large degree of puckering

(Thread is too tight)

9 Lower thread is tangled at

the sewing start. Bobbin is spinning during thread trimming.

0473M

0978M

Lower

thread

0751M

・ Is the presser foot pressure too weak?

Adjust the presser foot pressure.

・ Is the feed dog too low?

Adjust the feed dog height.

・ Is the bobbin scratched?

If the bobbin is damaged, smooth it with an oiled grindstone or replace it. Alternatively, replace the bobbin.

・ Is the upper thread tension too strong?

Make the upper thread tension as weak as possible.

・ Is the lower thread tension too strong?

Make the lower thread tension as weak as possible.

・ Is the needle tip blunt?

Replace the needle if it is blunt.

・ Is the needle too thick?

Replace with as thin a needle as possible.

・ Is the thread take-up spring tension too strong?

Make the thread take-up spring tension as weak as possible.

・ Is the thread take-up spring operating range too large?

Lower the position of the thread take-up spring to as low a position as possible.

・ Is the presser foot pressure too strong?

Adjust the presser foot pressure.

・ Is the sewing speed too fast?

Gradually reduce the sewing speed.

・ Is the angle of the feed dog correct?

Tilt the front of the feed dog down slightly.

・ Is the bobbin spinning direction correct when the lower thread is

being pulled?

Set the bobbin so that it turns in the opposite direction to the rotary hook.

・ Is there too much thread

wound onto the bobbin?

The bobbin winding amount should not be

2124M

more that 80 %.

・ Is the anti-spin spring attached?

Attach the anti-spin spring.

・ Is the bobbin turning smoothly?

If the bobbin is not turning smoothly, replace the bobbin.

・ Is a bobbin other that the light-alloy bobbin specified by Brother being

used?

Use only bobbins which are specified by Brother.

50*

18*

51*

S-7250A

Page 73

Problem Possible cause Page

10 Upper and lower threads

are breaking.

0471M

11 Thread breaks during

backtack sewing.

12 Backtack sewing pitch

varies depending on the sewing direction. Backtack edge is not aligned.

13 Thread tightening around

X-over seam areas.

14 Upper thread is pulling out

of the needle after thread trimming.

7. TROUBLESHOOTING

・ Is the needle tip bent? Is the needle tip blunt?

If the needle tip is bent or blunt, replace the needle.

・ Is the needle properly installed?

If it is incorrect, install the needle correctly.

・ Is the machine properly threaded?

If it is incorrect, thread the thread correctly.

・ Is the rotary hook sufficiently lubricated?

If the oil gauge is down to the lower reference line in the oil gauge window, add more oil.

・ Is the upper or lower thread tension too weak or too strong?

Adjust the upper thread or lower thread tension.

・ Is the upper thread may be loose because the thread take-up spring

operating range is too small?

Adjust the position of the thread take-up spring.

・ Is the rotary hook, feed dog or other part damaged?

If the thread path is damaged, smooth it with sandpaper or similar. Alternatively, replace the damaged part.

・ Is the thread path damaged?

If the thread path is damaged, smooth it with sandpaper. Alternatively, replace the damaged part.

・ Is the backtack sewing speed too fast?

Use the panel to reduce the backtack sewing speed.

Adjust using memory switch No. 201. 38*

・ Is the height of the feed dog correct?

Increase the feed dog height.

・ Is the upper thread trailing length after thread trimming appropriate?

Decrease the tension of the pre-tension.

・ Is the thread path not smooth enough?

Use a file with a fine grain or sandpaper to polish smooth the thread path.

・ Does the thread being used slip easily?

Turn the needle bar bush thread guide D sideways to increase the resistance.

・ If the upper thread is pulling out of the needle after thread trimming,

check using the method given below.

1. Check the upper thread trailing length.

2. Re-adjust the upper thread trailing length to make it longer.

3. Select "T/T short parameter" from "Function setting". (Refer to "4-6. Setting basic functions".)

(1) Delete the stitch pitch for the previous stitch. (2) Decrease the sewing speed for the final stitch and the

stitch before it.

47*

50*

24*

S-7250A

Page 74

7. TROUBLESHOOTING

Problem Possible cause Page

15 Upper thread is raised

above the material surface after thread trimming.

16 When T/T short is on,

skipped stitches occur where they should be sewn at the sewing end.

17 When T/T short is on,

condense stitches (the final stitch and the one before it) cannot be sewn neatly before thread trimming.

18 Thread trailing length on

underside of material is too long.

19 When T/T short is on,

thread trailing length on underside of material is too short.

20 To prevent fraying at the

sewing end

21 Incorrect thread trimming

(Upper and lower threads are both not being trimmed)

・ Upper thread protrudes from the material surface after thread

trimming.

・ Select "T/T short parameter" from "Function setting". (Refer to "4-6.

Setting basic functions".)

1. Increase the pitch during thread trimming.

2. Set the feed direction for sewing end processing to "bw".

・ Use the T/T short parameters to delete the the stitch before the final

stitch.

・ Use the T/T short parameters to reduce the stitch pitch of the final

stitch and the one before it.

・ Use the T/T short parameters to set the feed direction for sewing end

processing to "bw".

If sewing backtack stitches

・ Reduce the number of stitches (D) for backtack sewing by 1 stitch

・ Use the T/T short parameters to increase the stitch pitch. ・ Use the T/T short parameters to reduce the sewing speed.

・ Turn on the T/T short function.

If you would like the trailing length to be even sorter after turning on the T/T short function.

・ Is the meshing position of the thread trimming knives directly

below the needle hole?

・ Use the T/T short parameters to reduce the stitch pitch of the

condense stitches (the final stitch and the one before it) before thread trimming.

・ Use the T/T short parameters to reduce the pitch during thread

trimming.

・ Use the T/T short parameters to increase the pitch during

thread trimming.

・ Turn on T/T short processing, and then use the T/T short parameters

to set the feed direction for sewing end processing to "bw".

・ Is the fixed knife or movable knife damaged or worn?

Replace the fixed knife or the movable knife.

・ Is there not enough of a meshing amount between the upper knife

and the lower knife?

Adjust the tip of the upper knife to the lower knife index position so that the knives mesh.

24*

(65-15)

15*

24*

(65-15)

32*

55* 24*

(65-15)

24*

(65-15)

24*

(65-15)

55*

S-7250A

Page 75

Problem Possible cause Page

22 Incorrect thread trimming

(Upper thread is not being trimmed.) (Lower thread is not being trimmed.)

0.1 - 0.3 mm

23 Broken needle

0949D

0469M

7. TROUBLESHOOTING

・ Is the needle properly installed?

If it is incorrect, install the needle correctly.

・ Is the fixed knife or movable knife blunt?

Replace the fixed knife or the movable knife.

・ Tilt the upper knife forward slightly. (About 0.1 to 0.3 mm) ・ Is there not enough of a meshing amount between the upper knife

and the lower knife?

Check that the tip of the upper knife comes to the lower knife index position so that the knives mesh.

・ Is the material being pushed or pulled with excessive force during

sewing?

・ Is the needle properly installed?

If it is incorrect, install the needle correctly.

・ Is the needle tip bent? Is the needle tip broken, or is the needle hole

blocked?

Replace the needle.

・ Is the needle and rotary hook timing correct?

Adjust the height of the needle bar. Adjust the clearance between the needle and the tip of the rotary hook.

・ Is the needle and feed mechanism timing correct?

Adjust to the standard timing.

・ Try pressing the special locus key and selecting No. 2 or No. 3.

NOTE

・ It is extremely dangerous to leave any pieces of broken

needle sticking in the material. If the needle breaks, search for all pieces until the whole of the needle is found again.

・ Furthermore, we recommend that thorough steps be taken

to account for such needles to comply with product liability regulations.

55*

53*

52*

S-7250A

Page 76

7. TROUBLESHOOTING

Problem Possible cause Page

24 Machine does not operate

when power is turned on and treadle is pressed.

25 Machine does not operate

at high speed.

26 Machine stops during

sewing.

27 Nothing appears on the

operation panel display.

28 The illumination becomes

momentarily darker or flickers.

・ Is the power supply connector

disconnected from the control box?

Insert the connectors securely.

1452D

・ Is the sewing speed setting or backtack stitch speed setting too

slow?

Set a higher sewing speed.

・ Is the power supply voltage too low?

Check the power supply voltage. (If the power cord is too long or too many appliances are being run from a single outlet, this may cause voltage drops which will in turn cause the reset function to activate and stop the machine, even if the power supply itself is normal.)

・ Is the power supply connector

1452D

disconnected from the control box?

Insert the connectors securely.

・ Is the operation panel

connector inside the control box disconnected?

Insert the connectors securely.

1453D

・ The illumination may become momentarily darker or flicker when the

sewing machine starts or stops, depending on the power supply in the environment where the sewing machine is being used. This is not a sign of a malfunction.

11・12

18・19

11・12

S-7250A

Page 77

7-2. Error code displays

If an error code appears on the operation panel display

1. Make a note of the error code and then turn off the power.

2. After the operation panel display has turned off, eliminate the cause of the error and then turn the power back on.

・ Items with a "*" in the "Page" column should only be checked by a qualified technician. ・ For items with "**" appearing in the "Page" column, ask the place of purchase for advice.

Sewing machine motor

1454D

connector

Connector P2

Connector P3

S-7250A

7. TROUBLESHOOTING

Connector P1

Connector P4

Connector P6

Connector P7

Connector P5

Power supply

connector

Feed motor connector

1451D

Page 78

7. TROUBLESHOOTING

Switch-related errors

Code Cause Remedy

E050

E051 E055

E065

E066

E090 E095

Sewing machine motor-related errors

Code

E111 E112

E113

E130

E131 E132 E133 E140 E150 E151

Machine head is detected as being tilted back when start sewing.

Machine head is detected as being tilted back during sewing. Machine head is detected as being tilted back when power was turned on.

A disabled key was being pressed when the power was turned on.

The hand switch was being pressed when the power was turned on.

Connection of treadle was not detected when power was turned on. Treadle or standing operation pedal was being pressed when power was turned on.

Cause Remedy

The needle up stop position exceeded the specified value when the sewing machine motor stopped.

The needle up or needle down stop position did not reach the specified value when the sewing machine motor stopped. The needle down stop position exceeded the specified value when the sewing machine motor stopped. Sewing machine motor did not operate at sewing start or during sewing.

Sewing machine motor encoder connection was not detected when power was turned on. Abnormal sewing speed of sewing machine motor was detected during sewing. Abnormal signal of sewing machine motor encoder was detected during sewing. Sewing machine motor ran in opposite direction to the direction specified during sewing. Abnormal overheating detected in sewing machine motor. Motor overheating sensor connection was not detected.

・Turn off the power, and then return the machine

head to its original position.

・Turn off the power and check the connection of

connector P2. Turn off the power and check the connection of connector P2. ・Turn off the power, and then return the machine

head to its original position. ・Turn off the power and check the connection of

connector P2. Turn the power off and then back on again. * Do not press a disabled key while turning on the

power. Turn the power off and then back on again. * Do not press the hand switch when turning on the

power. Turn off the power and check the connection of connector P7. Return treadle unit or standing up operation pedal to original portion. * Do not press the treadle or the standing operation

pedal when turning on the power.

Turn off the power and check if the sewing machine motor or thread trimming mechanism is stiff or not.

・Turn off the power and check if the sewing machine

motor is stiff or not.

・Turn off the power and check the connections of the

sewing machine motor connector and connector

P4. Turn off the power and check the connection of connector P4. Turn off the power and check the connection of connector P4. Turn off the power and check the connection of connector P4. Turn off the power and check the connection of connector P4. Turn off the power and check the sewing conditions.

Turn off the power and check the connection of connector P4.

E161 E190 E191

Sewing machine motor overload was detected during sewing. Sewing machine motor was running continuously for too long during sewing. Thread trimming solenoid operation was not completed within the specified period.

S-7250A

Turn off the power and check the sewing conditions.

Turn the power off and then back on again.

Turn off power and check if the thread trimming mechanism is stiff.

Page 79

Feed mechanism-related errors

Cause Remedy

Code

E210

E211

E251

Communication and memory-related errors

Code

E410 E440 E441 E442 E450 E451

P.C. board-related errors

Code

E700 E701

E705

Feed motor origin is not detected when power is turned on.

Abnormal feed motor operation detected during sewing.

Abnormal feed motor overheating detected or feed motor overheating sensor was not detected.

Cause Remedy

Communication error with panel occurred when power was turned on. Data could not be written to the backup memory (main internal P.C. board). Data could not be read from the backup memory (main internal P.C. board). Back up memory (main internal P.C. board) data was abnormal, so settings were initialized. Model settings could not be read from machine head memory (internal panel). Data backup cannot be written to machine head memory (internal panel).

Cause Remedy

Abnormal rise in power supply voltage was detected when power was turned on. Abnormal rise in sewing machine motor power supply voltage was detected.

Abnormal drop in power supply voltage was detected.

7. TROUBLESHOOTING

・ Turn off the power and check that the feed

mechanism is not abnormal.

・ Turn off the power and check the feed motor

connector and connector P3.

・ Turn off the power and check that the feed

mechanism is not abnormal.

・ Turn off the power and check the feed motor

connector and connector P3.

・Turn off the power and check the sewing conditions. ・Turn off the power and check the connection of

connector P3.

Turn off the power and check the connection of connector P2. Turn the power off and then back on again.

Turn the power off and then back on again.

Turn off the power and check the power supply voltage.

・Turn off the power and check the power supply

voltage.

・Turn off the power and check the connection of

connector P5.

Turn off the power and check the power supply voltage.

E709 E710 E711 E791

Power supply signal could not be detected when power was turned on. Abnormal sewing machine motor current was detected. Abnormal feed motor current was detected. Turn off the power and check the connection of

Abnormal solenoid mechanism current detected when solenoid was activated.

S-7250A

Turn the power off and then back on again.

Turn off the power and check the connection of connector P4.

connector P3. Turn off the power and check the connection of connector P1.

Page 80

7. TROUBLESHOOTING

Version updating errors

Cause Remedy

Code

E882 E883 E884 E885 E886 E887

No USB medial connected when power was turned on. Version update file could not be detected in USB media when power was turned on. Problem with version update file detected during version updating. Version update file could not be read from USB media during version updating. Problem with version update file detected during version updating. Version update file could not be written during version updating. Incorrect data written to flash memory. Turn off the power, and then repeat the version

E889 E890

Error occurred during version update. Turn off the power, and then repeat the version

If an error code that is not listed above appears or if carrying out the specified remedy does not solve the problem, contact the place of purchase.

Turn off the power and check the connection of the USB media. Turn off the power and then check that the version update file is contained in the USB media. Turn off the power, and then repeat the version update procedure. Turn off the power and check the connection of the USB media. Turn off the power, and then repeat the version update procedure. Turn off the power, and then repeat the version update procedure.

update procedure.

S-7250A

Page 81

8. 7-SEGMENT DISPLAY

S-7250A

Page 82

INSTRUCTION MANUAL

* Please note that the contents of this manual may differ slightly from the actual product purchased as a result of product improvements.

This is the original instructions.

S-7250

I7081169D E

2017.09.D(3)

Brother S-7250A Instruction Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SAFETY INSTRUCTIONS

[1] Safety indications and their meanings

[2] Notes on safety

[3] Warning labels

CONTENTS

1. MACHINE SPECIFICATIONS

2. INSTALLATION

2-1. Table processing diagram

2-2. Installation

2-3. Lubrication

2-4. Connecting the cords

2-4-1. Connecting the cords

2-4-2. Other cords

3. USING THE OPERATION PANEL (BASIC OPERATIONS)

3-1. Names and functions

3-2. Sewing start and end backtack stitches

3-3. Sewing continuous backtack stitches

4. USING THE OPERATION PANEL (ADVANCED OPERATIONS)

4-1. Sewing pitch setting method

4-2. Switching the 4-digit display

4-3. Setting the sewing speed

4-3-1. Setting the maximum sewing speed

4-3-2. Backtack sewing speed setting method

4-4. Setting the counters

4-4-1. Lower thread counter

4-4-2. Production counter

4-4-3. Needle replacement counter

4-5. Sewing locus setting method

4-6. Setting basic functions

4-6-1. Changing the needle stop position

4-6-2. Thread trimming disable

4-6-3. Thread wiping

4-6-4. Correction sewing

4-6-5. Slow start

4-6-6. Setting the illumination LED light

4-6-7. Setting lower thread counter operation

4-6-8. Prev. thread away

4-6-9. Short trailing thread

4-6-10. Correction sewing function (1)

4-6-11. Correction sewing function (2)

4-7. Memory switch setting method

4-8. List of memory switch settings

4-9. Reading and writing data using USB media

4-10. Resetting all settings to their defaults

4-11. Hand switch

4-11-1. Hand switch function setting

4-11-2. 2nd correction pitch setting

4-11-3. 2nd pitch setting

4-11-4. Menu numbers for setting functions for the hand switch

5. CLEANING

6. STANDARD ADJUSTMENTS

6-1. Arm thread guide R

6-2. Presser foot height

6-3. Adjusting the feed dog height

6-4. Adjusting the feed dog angle

6-5. Adjusting the needle bar height

6-6. Adjusting the needle and feed mechanism timing

6-7. Needle and rotary hook timing

6-8. ADJUSTING THE ROTARY HOOK LUBRICATION AMOUNT

6-9. Thread trimming (Other than short trailing thread specifications)

6-10. Thread trimming (Short trailing thread specifications)

7. TROUBLESHOOTING

7-1. Sewing

7-2. Error code displays

8. 7-SEGMENT DISPLAY